Risedronate to Prevent Skeletal Related Events in Patients With Metastatic Prostate Cancer Commencing Hormonal Therapy

Summary

Risedronate is an orally administered pyridinyl bisphosphonate that is 36 times more potent than pamidronate and 72 times more potent than clodronate. Four randomized, double-blind trials have been carried out in patients with postmenopausal osteoporosis. In 2 of these studies, vertebral fracture incidence was reduced by a daily dose of 5 mg risedronate by up to 65% and 49% relative to placebo after 1 and 3 years, respectively. In these trials, risedronate improved lumbar spine, femoral neck, and femoral trochanter bone mineral density (BMD) at 6 months. In addition, preclinical studies have shown that risedronate is more potent than pamidronate and clodronate in inhibiting adhesion of prostate cancer cells to bone and preventing tumor cell invasion. The incidence of osteoporosis in prostate cancer patients has been well established; therefore, it is advantageous to assess the efficacy of oral bisphosphonate therapy.

Timeline

Start

2003-10

Primary completion

2008-02

Completion

2008-03

Publications

• Results C. Sweeney, W. M. Dugan II, R. Dreicer, F. Chu, G. Parks, K. Baker, D. Reed, K. Jansz, J. Zadra, C. T. Yiannoutsos. J Clin Oncol 28, 2010 (suppl; abstr e15000)
• Jakob T, Tesfamariam YM, Macherey S, Kuhr K, Adams A, Monsef I, Heidenreich A, Skoetz N. Bisphosphonates or RANK-ligand-inhibitors for men with prostate cancer and bone metastases: a network meta-analysis. Cochrane Database Syst Rev. 2020 Dec 3;12(12):CD013020. doi: 10.1002/14651858.CD013020.pub2.
• Hahn NM, Yiannoutsos CT, Kirkpatrick K, Sharma J, Sweeney CJ. Failure to suppress markers of bone turnover on first-line hormone therapy for metastatic prostate cancer is associated with shorter time to skeletal-related event. Clin Genitourin Cancer. 2014 Feb;12(1):33-40.e4. doi: 10.1016/j.clgc.2013.07.002. Epub 2013 Oct 12.

Drugs

Indications